Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6aa22303d277837…

MALICIOUS

PDF

77.9 KB Created: 2021-03-23 19:24:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 98c4fcb4e55e6bbfdc3a38c211940b1e SHA-1: f5014d64edd276e0bbebe694975ea65a2dbe6951 SHA-256: f6aa22303d277837cdf7305d358dbdfb53e22e67113bc434a79d9d368466d604
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, characteristic of a link farm, with several pointing to disposable hosting services. The presence of 'utm_term' parameters suggests tracking or phishing campaigns. While no scripts were explicitly extracted, the PDF structure and link farm behavior strongly indicate an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://vilenefex.ru/strik?utm_term=boss+me+50b+manuale+italiano PDF link annotation
    • https://cdn.sqhk.co/guwuweri/of1yUhh/futezamileto.pdfIn PDF document text
    • https://cdn.sqhk.co/bofotabi/hdR0gcq/kemuremixejeguneruwugag.pdfIn PDF document text
    • https://pemugaladesav.weebly.com/uploads/1/3/5/3/135307247/6289788.pdfIn PDF document text
    • https://jitojadafolad.weebly.com/uploads/1/3/4/4/134404030/4677501.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369788/normal_5fe2f75e77fc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475219/normal_60374db01fd6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380209/normal_600b075728093.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390051/normal_603fb94aa49ff.pdfIn PDF document text
    • https://metulomoponi.weebly.com/uploads/1/3/4/4/134498565/de3ee79a2b.pdfIn PDF document text
    • https://liritetujom.weebly.com/uploads/1/3/5/3/135310948/seloki.pdfIn PDF document text
    • https://sovuzozasofebod.weebly.com/uploads/1/3/4/3/134343281/palupuba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496165/normal_5ffe4f708c303.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368740/normal_60031b6c5c4c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489976/normal_5fe6f2791420d.pdfIn PDF document text
    • https://cdn.sqhk.co/fapolokid/igTsvJf/dobexegovuden.pdfIn PDF document text
    • https://cdn.sqhk.co/motulobugaji/Uid6ujf/7229346332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388158/normal_601638f290588.pdfIn PDF document text
    • https://bovikobugekut.weebly.com/uploads/1/3/0/7/130775803/borudu_guzudem.pdfIn PDF document text
    • https://lorotorerusut.weebly.com/uploads/1/3/1/4/131452969/nelisala.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454965/normal_60065d3e29865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477367/normal_605628d32da1d.pdfIn PDF document text
    • https://buxiwizekekaxe.weebly.com/uploads/1/3/4/6/134662233/suxemugopufepojugaje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nonipesikiri/weather_report_buckley_wa.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/cydia_eraser_ios_12.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/wsjt_x_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/96307568055.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DA 5072 bytes
SHA-256: e59a4e6dc71181e7c0ee9fba0aaf81a2afa3cdf89449d403b0096e0800594514
font_01_sfnt_off0000f600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF600 11240 bytes
SHA-256: 3d87ecf1db39f254bf946007aaff920cdc926451eca40bb7916f2dd47a5569b7
font_02_sfnt_off00011bd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD6 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.